Systems and methods for inspecting particulate filters

Patent metadata

Field	Value
Publication number	US-11808683-B2
Application number	US-202217572953-A
Country	US
Kind code	B2
Filing date	Jan 11, 2022
Priority date	Jan 3, 2019
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

A particulate filter inspection system for a particulate filter includes a compressed air source, a primary conduit, a controller, a probe, and a gauge. The compressed air source is configured to draw air from an air source. The primary conduit is configured to receive the air from the compressed air source. The probe is coupled to the primary conduit and communicable with the controller. The probe is configured to interface with a face of the particulate filter to provide the air to only a sector of the particulate filter. The gauge is configured to determine a pressure of the air within the primary conduit when the probe is providing air to only a sector of the face of the particulate filter. The controller is configured to receive the pressure from the gauge, compare the pressure to a target upper pressure, and provide an indication that the particulate filter is dirty if the pressure is not lower than the target upper pressure.

First claim

What is claimed is:

1. A particulate filter inspection system for a particulate filter, the particulate filter inspection system comprising:
a compressed air source configured to draw air from an air source;
a primary conduit configured to receive the air from the compressed air source;
a probe coupled to the primary conduit, the probe configured to interface with a face of the particulate filter to provide the air to only a sector of the particulate filter;
a gauge configured to determine a pressure of the air within the primary conduit when the probe is providing the air to only a sector of the face of the particulate filter; and
a controller communicable with the probe, the controller configured to:
compare the pressure to a target upper pressure, and
increase a plugged sector count when the pressure is not lower than the target upper pressure.

2. The particulate filter inspection system of claim 1 , wherein the controller is further configured to:
compare the plugged sector count to a target plugged sector count, and
provide an indication that the particulate filter is dirty when the plugged sector count is greater than the target plugged sector count.

3. The particulate filter inspection system of claim 1 , further comprising an orifice plate configured to be selectively coupled to the probe, the orifice plate configured to interface with the particulate filter and to separate the probe from the particulate filter when the orifice plate interfaces with the particulate filter.

4. The particulate filter inspection system of claim 3 , wherein the gauge is further configured to facilitate determining of a calibration pressure of the air within the primary conduit when the probe is not providing the air to only a sector of the face of the particulate filter and when the orifice plate is coupled to the probe and interfaces with the particulate filter.

5. The particulate filter inspection system of claim 4 , wherein:
the compressed air source is further configured to provide the air into the primary conduit at a target compressed air source pressure; and
the controller is further configured to:
compare the calibration pressure to a target calibration pressure when the orifice plate is coupled to the probe and interfaces with the particulate filter, and
selectively adjust the target compressed air source pressure based on the comparison between the calibration pressure and the target calibration pressure.

6. The particulate filter inspection system of claim 5 , further comprising a mass flow meter positioned along the primary conduit and configured to facilitate determination of a flow rate of the air flowing through the primary conduit.

7. The particulate filter inspection system of claim 6 , wherein the controller is further configured to:
compare the flow rate to a target flow rate when the orifice plate is coupled to the probe and interfaces with the particulate filter; and
selectively adjust the target compressed air source pressure based on the comparison between the flow rate and the target flow rate.

8. The particulate filter inspection system of claim 1 , wherein the controller is further configured to:
compare the pressure to a target lower pressure; and
provide an indication that the particulate filter has a leak or fails a test if the pressure is not greater than the target lower pressure.

9. The particulate filter inspection system of claim 1 , wherein the probe comprises a seal member that is configured to interface with the face of the particulate filter and to establish a seal between the probe and the face of the particulate filter.

10. A particulate filter inspection system for a particulate filter, the particulate filter inspection system comprising:
a compressed air source configured to draw air from an air source;
a primary conduit configured to receive the air from the compressed air source;
a probe coupled to the primary conduit, the probe configured to interface with a face of the particulate filter to provide the air to only a sector of the particulate filter;
a gauge coupled to the probe, the gauge configured to determine a pressure of the air within the probe when the probe is providing the air to only a sector of the face of the particulate filter;
an auxiliary conduit coupled to the gauge and the probe, the auxiliary conduit separating the gauge from the probe;
a controller communicable with the probe, the controller configured to:
compare the pressure to a target upper pressure, and
increase a plugged sector count when the pressure is not lower than the target upper pressure.

11. The particulate filter inspection system of claim 10 , wherein the controller is further configured to:
compare the plugged sector count to a target plugged sector count, and
provide an indication that the particulate filter is dirty when the plugged sector count is greater than the target plugged sector count.

12. The particulate filter inspection system of claim 10 , wherein the controller is further configured to:
compare the pressure to a target lower pressure; and
provide an indication that the particulate filter has a leak or fails a test if the pressure is not greater than the target lower pressure.

13. The particulate filter inspection system of claim 10 , further comprising an upstream gauge upstream of a pressure regulator, the upstream gauge communicable with the controller and configured to facilitate determination of a pressure of the air within the primary conduit upstream of the gauge.

14. The particulate filter inspection system of claim 10 , further comprising:
an upstream gauge communicable with the controller and configured to facilitate determination of a pressure of the air within the primary conduit upstream of the gauge; and
a pressure regulator downstream of the upstream gauge, the pressure regulator communicable with the controller and coupled to the primary conduit between the upstream gauge and the gauge, the pressure regulator defined by a target pressure regulator pressure;
wherein the controller is configured to adjust the target pressure regulator pressure based on at least one of the pressure received from the upstream gauge or the pressure received from the gauge.

15. The particulate filter inspection system of claim 13 , further comprising a de-humidifier communicable with the controller and coupled to the primary conduit downstream of the compressed air source and upstream of the probe;
wherein the controller is configured to control operation of the de-humidifier based on the pressure received from the gauge.

16. The particulate filter inspection system of claim 10 , wherein the probe comprises a seal member that is configured to interface with the face of the particulate filter and to establish a seal between the probe and the face of the particulate filter.

17. A particulate filter inspection system for a particulate filter, the particulate filter inspection system comprising:
a primary conduit configured to receive air;
a probe coupled to the primary conduit, the probe configured to interface with a face of the particulate filter to provide the air to only a sector of the particulate filter;
a gauge configured to determine a pressure of the air within the primary conduit when the probe is providing the air to only a sector of the face of the particulate filter; and
a controller communicable with the probe, the controller configured to:
compare the pressure to a target upper pressure,
increase a plugged sector count when the pressure is not lower than the target upper pressure,

Assignees

• Cummins Inc

Inventors

• Chilumukuru Krishna Pradeep
• Clerc James C
• Allotey Richard Adotey
• Zazueta Luis Fernando Loo
• Wieland Todd M
• Lombardo Rafael Ernesto Vasquez

Classifications

• G01N15/0826 Primary

  and measuring fluid flow rate, i.e. permeation rate or pressure change · CPC title

• G01N2015/084

  Testing filters · CPC title

• G01M15/02 Primary

  Details or accessories of testing apparatus · CPC title

• G01M15/04

  Testing internal-combustion engines · CPC title